refactor: remove path parameter normalization from generateValidRootSchema

The normalization that forced required: true on path parameters in
generateValidRootSchema was not needed for correct TypeScript type generation.
Parameter.ts already handles this via isPathProperty in generatePropertySignatureObject,
which always produces a required property for path parameters regardless of the
required field in the spec.

Remove normalizePathParameters and its unit tests, keeping generateValidRootSchema
minimal. Update parameter.json snapshots to reflect the absence of the injected
required: true field (TypeScript interface output is unchanged).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Himenon

src/__tests__/generateValidRootSchema.test.ts

@@ -1,36 +1,22 @@
 import type * as Types from "./types";
 
-const normalizePathParameters = (parameters: (Types.OpenApi.Parameter | Types.OpenApi.Reference)[] | undefined): void => {
-  if (!parameters) {
-    return;
-  }
-  for (const parameter of parameters) {
-    if ("$ref" in parameter) {
-      continue;
-    }
-    // OpenAPI 3.x spec §3.3.2: path パラメータは常に required: true
-    if (parameter.in === "path") {
-      parameter.required = true;
-    }
-  }
-};
-
 export const generateValidRootSchema = (input: Types.OpenApi.Document): Types.OpenApi.Document => {
-  if (input.components?.parameters) {
-    normalizePathParameters(Object.values(input.components.parameters));
-  }
-
   if (!input.paths) {
     return input;
   }
-
-  const httpMethods = ["get", "put", "post", "delete", "options", "head", "patch", "trace"] as const;
-
-  for (const [path, pathItem] of Object.entries(input.paths)) {
-    normalizePathParameters(pathItem.parameters);
-
-    for (const method of httpMethods) {
-      const operation = pathItem[method];
+  /** update undefined operation id */
+  for (const [path, methods] of Object.entries(input.paths || {})) {
+    const targets = {
+      get: methods.get,
+      put: methods.put,
+      post: methods.post,
+      delete: methods.delete,
+      options: methods.options,
+      head: methods.head,
+      patch: methods.patch,
+      trace: methods.trace,
+    } satisfies Record<string, Types.OpenApi.Operation | undefined>;
+    for (const [method, operation] of Object.entries(targets)) {
       if (!operation) {
         continue;
       }
@@ -41,9 +27,7 @@ export const generateValidRootSchema = (input: Types.OpenApi.Document): Types.Op
       if (!operation.operationId) {
         operation.operationId = `${method.toLowerCase()}${path.charAt(0).toUpperCase() + path.slice(1)}`;
       }
-      normalizePathParameters(operation.parameters);
     }
   }
-
   return input;
 };

src/generateValidRootSchema.ts

@@ -689,8 +689,7 @@ exports[`Parameter > required フィールドを省略したパスパラメー
       "pickedParameters": [
         {
           "name": "id",
-          "in": "path",
-          "required": true
+          "in": "path"
         }
       ],
       "requestContentTypes": [],
@@ -720,8 +719,7 @@ exports[`Parameter > required フィールドを省略したパスパラメー
           "name": "id",
           "schema": {
             "type": "string"
-          },
-          "required": true
+          }
         }
       ],
       "responses": {
@@ -761,13 +759,11 @@ exports[`Parameter > required フィールドを省略したパスパラメー
       "pickedParameters": [
         {
           "name": "name",
-          "in": "path",
-          "required": true
+          "in": "path"
         },
         {
           "name": "path",
-          "in": "path",
-          "required": true
+          "in": "path"
         },
         {
           "name": "path",
@@ -801,16 +797,14 @@ exports[`Parameter > required フィールドを省略したパスパラメー
           "name": "name",
           "schema": {
             "type": "string"
-          },
-          "required": true
+          }
         },
         {
           "in": "path",
           "name": "path",
           "schema": {
             "type": "string"
-          },
-          "required": true
+          }
         },
         {
           "in": "query",
@@ -849,13 +843,11 @@ exports[`Parameter > required フィールドを省略したパスパラメー
       "pickedParameters": [
         {
           "name": "name",
-          "in": "path",
-          "required": true
+          "in": "path"
         },
         {
           "name": "path",
-          "in": "path",
-          "required": true
+          "in": "path"
         },
         {
           "name": "path",
@@ -883,16 +875,14 @@ exports[`Parameter > required フィールドを省略したパスパラメー
           "name": "name",
           "schema": {
             "type": "string"
-          },
-          "required": true
+          }
         },
         {
           "in": "path",
           "name": "path",
           "schema": {
             "type": "string"
-          },
-          "required": true
+          }
         },
         {
           "in": "query",
@@ -924,13 +914,11 @@ exports[`Parameter > required フィールドを省略したパスパラメー
       "pickedParameters": [
         {
           "name": "userId",
-          "in": "path",
-          "required": true
+          "in": "path"
         },
         {
           "name": "postId",
-          "in": "path",
-          "required": true
+          "in": "path"
         },
         {
           "name": "include",
@@ -964,16 +952,14 @@ exports[`Parameter > required フィールドを省略したパスパラメー
           "name": "userId",
           "schema": {
             "type": "string"
-          },
-          "required": true
+          }
         },
         {
           "in": "path",
           "name": "postId",
           "schema": {
             "type": "integer"
-          },
-          "required": true
+          }
         },
         {
           "in": "query",